Locking bolt for spring locks



Jan. 6, 1931.

J. DESPLATS LOCKING BOLT FOR SPRING LOCKS Filed sept. 15, 1928 sheets-sheet 1 nventoz dose'. @ago/@lis @www Jan; 6, 1931. J. DEsPLATs LOCKING BOLT FOR SPRING LOCKS 2 heets-sheet 2 Filed sept. 15 1928 wvamtoz Josee /a/S @51g @Mime/n M Patented Jan. 6,1931

y Josn nnsrLAfr-s, on :BUENOS ninas, Anennm'mn f LocKrnG Bom ron'srnrnetoons j Application aieaseptember is, ieaaseriarno. 305,776, and inArgejnfiaa'Augst 1o, 192s. .r

, This invention relates toV improvements in locking bolts, which 1n their general application are designed to be used as spring locks fordoors, windows, motor car doors, and the like. Y

The essential feature of this new locking boltfresides inproviding a groove, in which the extension of fa spring operated trigger worksv in form of a stop, so that the trigger,

t0 when striking against a vdoor-frame, moves in the mentioned'g'roove in such a way as to clear the locking bolt, causing it to move forward and automatically lock the door. In order to restore'the locking device once more to its unlocked po-sition, the door latch has tobe pressed down, whereupon the spring actuated piece or trigger moves in such a way as 'tol form a stop in the locking device, so thatthis latter remains in its unlocked position. The'latch need therefor-ehe operated only for the purpose of opening the door, by pressing it down in the ordinary way, while locking takes place automatically.

The principle, on which this invention is based, hasbeen explained, but there exist numerous forms and Vapplications of this looking device, which do not depart fromthe spirit. and scope of the invention.

A Any one of` theV constructional forms de- Y3,0 scribed and Yillustrated hereinafter, can'be applied to any kind 'of doors orwindows of livingrooms, motor car doors, and the like, since the variousmodifications shownare all founded on the same principle, and their ad- ?5 justment is easy.

The manufacture of locks providedwith this class of locking'bolts is comparatively no more expensive than that of the ordinary ones, on account of their simple and practical .40 construction. Y

For a full understanding of the invention and its merits, and also to illustrate various constructional forms of the same, reference is to be had to the accompanying drawings.

Fig. `l is a sectional view of the portion of a lock in which the locking bolt operates.

Fig. 2 is a front View of the locking device, seen from inside.

Fig. 3 is also a front view, from the inside,

y .5,0 similar to the former one.

Fig. Lleshows kthe face or` edge of aloclring bolt adapted to a door. v Y.

Fig. 5 isa viewof one of the .pieces which form part ofthe mechanism of the locking devicef. ,l 1`

, Fig. '6 is af view of the trigger, vwhiclris Vanother one of the pieces forming part of the looking device.

Fig. v7 isa side'view of a constructional modification of the locking-device, applied to alock. .p o f f: Fig. 8 is `a kcross sectional view of the formerone. j i f Fig. 9 shows 'a third construetional modiication ofthe locking bolt and itsoperating device, which can vbe applied to any one of the classes of.V locks shown in Figures l to 4, 7 to 8, as well as to others.

Fig. 10 is a sectional vi tion shown in Fig. 9..

Referring to Figs. l' to is asy follows:

On the linside l of the face of the lock there is provided a forked piece 2, fastened by a ew of the modifica- 6, the construction screw 3 and having beneath the latter a small r bolt 4; on' which is mounted a leaf spring 5 which projectsk upward beneath said piece Q- and resiliently actuates a trigger `(l which moves in a guide channel'? provided in the upper portion ofthe piece 2. The trigger 6 is provided with two cross arms 6 and 9 to form a double `cross which has a lateral movement in the guide channel 7 in which the trigger Gmoves. The lower portions of the cross arms 6 and-9 carry laterally the free end of the leaf spring 5, and the upper portion of said .cross arm 9v is in abutting relation with the shaftof the locking bolt 10.

The locking bolt is provided in itsl lower portion with a transverse Vgroove ll and a longitudinal projection 12, in which portions the upper part .of the cross arm 9 can move. The device is o} C era.-ted in this case as follows The lockingbolt issupposed to'be adjusted in unlocked position in a door. n

In this position, the cross' arm 9 of the trigger' is within the groove 11` of the shaft of the locking 'bolt l0. When shutting the door, the end 13 of the trigger 6 strikes againstthe door frame and', as a consequence',

oted tumbler 14 against the action ofk a heliT cal spring 14, said tumblerpl engaging a projection 14 on'saidr locking bolt to retract the same. VVhereupon the piece 9, under the action of the spring 5, enters once more lthe groove 11 ofthe locking bolt 10, so that the door remains unlocked.

Referring now to Figures 7 and 8, the construction is as followsf On the internal face of the lock there is lprovided a piece 15 with 'a projection 16, on which a spring 17 is fastened, said spring operating the'pivoted trigger 18, which carries in its lower'portion an extension 19 mov-' ing in a groove provided in the shaft of the lockingbolt 21. @ne end 22 Vof the trigger '18 pivots on the projection 16 in which also the spring 17 is secured.l

Operation of the device in this case is as follows: y

Wlhen lthe bolt is in. unlocked position, the extensionA 19A of the trigger 18 is within thegroove 2O of the locking bolt 2l. When the end 23 of the trigger strikes against the frame work Vofthe door, it'moves and the extension 19 Vmoves out of the groove 20, through the longitudinal channel bore 20 close to the mentionedgroove20 of the locking bolt 21, so that this latter is'cleared, escapes and locks the door, in whi-ch action it is aided by the spring 24: fastened on one side in the shaft of thelocking bolt 21 and on the other side, in a piece 25 iiXed in the lock.

In order to restore t-he deviceto its unlocked position, the latch must be pressed down to turn a pivoted tumbler 14 against the action of a helical spring 14, said tumbler lfengaging a projection 14 on said locking bolt to retract the same. Thereupon the extension 19 of the trigger 18 enters under the action of the spring 17 the groove 20 in the shaft of the locking bolt- 21, so that this Vlatter remains in unlocked position.

Referring now to Figures 9 and 10, the modification shows .the followingconstruction.

` In the lock aszillustrated, the locking bolt 26 is'actuatedV by a spring 26', by Awhich it is moved outward when ycarrying out the locking' operation. The shaft of the bolt 26 hasa notch 26 in which a trigger 30 canmake a pivotal movementby means of a shaft'SO theends of which are in the body of the bolt 26. One of the ends of the trigger 30 which is curved, projects from the lockingbolt and the other end 30 formed by an1 .extension is actuated. by a springv 27 on the locking bolt 26. The end 30 is moved by the spring 27 to abut the inside of the wall of the lock and enters the hole 28, situated in the mentioned wall.v In connection with this, the keeper 29 can have a notch 29 or eventually,this notch may be arranged in the frame work of the door.

The operation of the locking device in this case is as follows: t

Zhen the locking bolt 26 is in its unlocked position and the door is shut, then the end 30 of the trigger 30 passes through the notch 29 of the'keeper 29 or its equivalent, strik` Y mains in unlocked position.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

A spring lock for doors comprising'a solid quadrilateral locking bolt having a longitudinal projection and provided with a transverse groove, resilient-means normally maintaining said locking bolt in locking position, a forked piece having two branches provided with alined transverse guide channels, a small bolt mounted on the lower portion of said forked piece, a trigger slidably mounted in said guide channels, two cross arms on said trigger between the branches of said forked piece, one of said cross arms being adapted to enter said groove when-said locking bolt is in completely retracted position and abut said projection in other positions of said locking bolt and a leaf spring mounted on said small bolt engaging said trigger between the lower ends of said cross arms normally actuating said trigger to abut said projection and enter said groove ofV said locking bolt.

In testimony whereof I have signed my name to this specification.

Josu DEsPLATs. 

